ExpressCard Connection Cable For PEX2PCI4. "The EC2PCI ExpressCard Connection Cable is specially designed to provide an ExpressCard connection for use with our PEX2PCI4 PCI Express to Four Slot PCI Expansion Bay, in turn allowing the PEX2PCI4 to be used with a notebook computer. Supporting data transfer rates of up to 2.5Gbps (1x lane), the EC2PCI offers a cost-effective way to maximize the expandability (using the PEX2PCI4) of a notebook computer, without having to open the computer."